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US2669360A
Expired / Lapsed
US
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Adjustable filter scraper blade
Assignee: Goslin-Birmingham Manuf Co
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Filing: 1951-11-29
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Granted: 1954-02-16
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Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 John W Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:04
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D33/00; B01D33/06; B01D33/067; B01D33/44; B01D33/46; B01D33/466
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB176619A
Cited
US1415859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |